No problems with heat, since the desk is almost always open and the power supplies are plugged into the power strip under the desk.

The way the front is hinged does provide some ventilation space near the top and bottom of the front when it’s closed. That should create a bit of a chimney effect, so heat generated inside the closed desk does have a way of getting out. Modifying the middle shelf to increase airflow, or venting the back, would certainly be a possibility.